<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8" />
  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
  <meta http-equiv="X-UA-Compatible" content="ie=edge" />
  <title>微博发布</title>
  <style>
    * {
      margin: 0;
      padding: 0;
    }

    ul {
      list-style: none;
    }

    .w {
      width: 900px;
      margin: 0 auto;
    }

    .controls textarea {
      width: 878px;
      height: 100px;
      resize: none;
      border-radius: 10px;
      outline: none;
      padding-left: 20px;
      padding-top: 10px;
      font-size: 18px;
    }

    .controls {
      overflow: hidden;
    }

    .controls div {
      float: right;
    }

    .controls div span {
      color: #666;
    }

    .controls div .useCount {
      color: red;
    }

    .controls div button {
      width: 100px;
      outline: none;
      border: none;
      background: rgb(0, 132, 255);
      height: 30px;
      cursor: pointer;
      color: #fff;
      font: bold 14px '宋体';
      transition: all 0.5s;
    }

    .controls div button:hover {
      background: rgb(0, 225, 255);
    }

    .controls div button:disabled {
      background: rgba(0, 225, 255, 0.5);
    }

    .contentList {
      margin-top: 50px;
    }

    .contentList li {
      padding: 20px 0;
      border-bottom: 1px dashed #ccc;
      position: relative;
    }

    .contentList li .info {
      position: relative;
    }

    .contentList li .info span {
      position: absolute;
      top: 15px;
      left: 100px;
      font: bold 16px '宋体';
    }

    .contentList li .info p {
      position: absolute;
      top: 40px;
      left: 100px;
      color: #aaa;
      font-size: 12px;
    }

    .contentList img {
      width: 80px;
      border-radius: 50%;
    }

    .contentList li .content {
      padding-left: 100px;
      color: #666;
      word-break: break-all;
    }

    .contentList li .the_del {
      position: absolute;
      right: 0;
      top: 0;
      font-size: 28px;
      cursor: pointer;
    }
  </style>
</head>

<body>
  <div class="w">
    <!-- 操作的界面 -->
    <div class="controls">
      <img src="./images/9.6/tip.png" alt="" /><br />
      <!-- maxlength 可以用来限制表单输入的内容长度 -->
      <textarea placeholder="说点什么吧..." id="area" cols="30" rows="10" maxlength="200"></textarea>
      <div>
        <span class="useCount" id="useCount">0</span>
        <span>/</span>
        <span>200</span>
        <button id="send">发布</button>
      </div>
    </div>
    <!-- 微博内容列表 -->
    <div class="contentList">
      <ul id="list"></ul>
    </div>
  </div>

  <!-- 需要的模板li 追加给 list ul -->
  <!-- <li>
    <div class="info">
      <img class="userpic" src="./images/9.6/03.jpg" />
      <span class="username">死数据:百里守约</span>
      <p class="send-time">死数据:发布于 2020年12月05日 00:07:54</p>
    </div>
    <div class="content">死数据:111</div>
    <span class="the_del">X</span>
  </li> -->

  <script>
    // 模拟数据 随机生成头像和名字
    const dataArr = [
      { uname: '司马懿', imgSrc: './images/9.5/01.jpg' },
      { uname: '女娲', imgSrc: './images/9.5/02.jpg' },
      { uname: '百里守约', imgSrc: './images/9.5/03.jpg' },
      { uname: '亚瑟', imgSrc: './images/9.5/04.jpg' },
      { uname: '虞姬', imgSrc: './images/9.5/05.jpg' },
      { uname: '张良', imgSrc: './images/9.5/06.jpg' },
      { uname: '安其拉', imgSrc: './images/9.5/07.jpg' },
      { uname: '李白', imgSrc: './images/9.5/08.jpg' },
      { uname: '阿珂', imgSrc: './images/9.5/09.jpg' },
      { uname: '墨子', imgSrc: './images/9.5/10.jpg' },
      { uname: '鲁班', imgSrc: './images/9.5/11.jpg' },
      { uname: '嬴政', imgSrc: './images/9.5/12.jpg' },
      { uname: '孙膑', imgSrc: './images/9.5/13.jpg' },
      { uname: '周瑜', imgSrc: './images/9.5/14.jpg' },
      { uname: '老夫子', imgSrc: './images/9.5/15.jpg' },
      { uname: '狄仁杰', imgSrc: './images/9.5/16.jpg' },
      { uname: '扁鹊', imgSrc: './images/9.5/17.jpg' },
      { uname: '马可波罗', imgSrc: './images/9.5/18.jpg' },
      { uname: '露娜', imgSrc: './images/9.5/19.jpg' },
      { uname: '孙悟空', imgSrc: './images/9.5/20.jpg' },
      { uname: '黄忠', imgSrc: './images/9.5/21.jpg' },
      { uname: '百里玄策', imgSrc: './images/9.5/22.jpg' },
    ]

    // function getItem() {
    //   let arr = localStorage.getItem('dataArrs') || []
    //   let obj = JSON.parse(arr)
    //   return obj
    // }
    // function setItem(data = []) {
    //   let str = JSON.stringify(data)
    //   localStorage.setItem('dataArrs', str)
    // }
    let list = document.querySelector('#list')
    // 创建 重新渲染 函数
    function render() {
      // 获取并转换本地存储 dataArrs 的数据
      const arr = JSON.parse(localStorage.getItem('dataArrs'))
      // 遍历 并返回
      const res = arr.map(function (item, index) {
        return `
        <li>
          <div class="info">
            <img class="userpic" src="${item.img}" />
            <span class="username">${item.uname}</span>
            <p class="send-time">${item.time}</p>
          </div>
          <div class="content">${item.content}</div>
          <span data-index="${index}" class="the_del">X</span>
          </li>
        `
      })
      // 添加到ul 评论区
      list.innerHTML = res.join('')
    }
    render()

    // 添加点击事件   删除功能
    list.addEventListener('click', function (e) {
      if (e.target.className === 'the_del') {
        let index = e.target.dataset.index
        let arr = JSON.parse(localStorage.getItem('dataArrs'))
        arr.splice(index, 1)
        localStorage.setItem('dataArrs', JSON.stringify(arr))
        render()
      }
    })

    // 获取发布按钮和文本域
    let area = document.querySelector('#area')
    let send = document.querySelector('#send')
    // 声明变量 存储现在时间
    let data = new Date().toLocaleString();
    send.addEventListener('click', function (e) {
      // 声明变量 存储随机数 方便之后的随机人 发布
      let myRandom = Math.floor(Math.random() * (dataArr.length - 1 - 0 + 1)) + 0
      // 判断文本域是否为空
      if (area.value.trim() === '') {
        return alert('评论内容不能为空')
      }
      // 创建一个新对象 
      const pinglun = {
        img: dataArr[myRandom].imgSrc,
        uname: dataArr[myRandom].uname,
        time: data,
        content: area.value.trim()
      }
      // 获取本地存储的数据 并进行转换
      let str = localStorage.getItem('dataArrs')
      let arr = JSON.parse(str) || []
      // 在数组前面添加 新对象
      arr.unshift(pinglun)
      // 把新添加的对象 转换为 JSON格式字符串 存进 本地存储 dataArrs
      localStorage.setItem('dataArrs', JSON.stringify(arr))
      // 重新渲染
      render()
      // 清空文本域
      area.value = ''
    })

  </script>

</body>

</html>